Zilog Z80 Microprocessor Family - Information, photos, identification, links to pinouts, support and second-source chips. [CPU-World] - http://www.cpu-world.com/CPUs/Z80/
Thomas Scherrer Z80-Family Official Support Page - Goal: collect and share information and good ideas on: Z80, Z180, Z280, Z380, CPUs; hardware, software, utilities, programming, Assembly, FAQ, support. - http://z80.info/
ZiLOG - Growing article, with links to many related topics, with product family link list. [Wikipedia] - http://en.wikipedia.org/wiki/ZiLOG
ZiLOG, Inc. - Designs, makes Z80 series microprocessors, DSPs; and other embedded logic: microcontrollers, microprocessors, infrared, IrDA, communications, TV subsystems. California, USA. - http://www.zilog.com/
Zilog Z80 - Growing article, with links to many related topics. [Wikipedia] - http://en.wikipedia.org/wiki/Zilog_Z80